地氟醚、七氟醚和异氟醚预处理增加缺氧/复氧心肌细胞ATP的贮存

Preconditioning with desflurane, sevoflurane and isoflurane increase the preservation of adenosine triphosphate in anoxia-reoxygenation myocardial cells

目的研究地氟醚、七氟醚和异氟醚预处理对缺氧/复氧心肌细胞ATP含量影响及其与细胞损害的关系。方法原代培养乳鼠心肌细胞随机分为对照、单纯缺氧/复氧及1.5肺泡气最低有效浓度(MAC)地氟醚、七氟醚和异氟醚预处理5组。实验结束测定心肌细胞内ATP、心肌酶LDH和CK、细胞存活率。结果1.5MAC地氟醚、七氟醚和异氟醚预处理显著减轻缺氧/复氧引起的ATP含量和细胞存活率下降 ,以及LDH和CK的升高 ;ATP含量变化与LDH和CK呈负相关 (r分别为 -0.87和 -0.82 ,P<0.01) ,与细胞存活率呈正相关 (r为0.83 ,P<0.01)。结论地氟醚、七氟醚和异氟醚预处理可增加缺氧/复氧心肌细胞内ATP ,是其心肌保护机制之一。

Aim To study the effects of preconditioning with desflurane, sevoflurane and isoflurane on adenosine triphosphate (ATP) in anoxia-reoxygenation myocardial cells. Methods Rat ventricular myocytes, cultured for 4～5 days, were randomly allocated to five groups: Control group, anoxia-reoxygenation group and groups preconditioned with 1.5 MAC desflurane, sevoflurane or isoflurane following anoxia-reoxygenation. The content of intracellular ATP ,the activities of lactic dehydrogenase(LDH) and creatine kinase(CK), and the cell viability were measured at the end of experiment.Results Preconditioning with 1.5 MAC desfllurane, sevoflurane or isoflurane significantly attenuated the great reduction in ATP and cell viability and the increase of LDH and CK caused by anoxia-reoxygenation. There was a positive correlationship between ATP and cell viability,and a negatiue correlationship between LDH and CK (r was 0.83, -0.87 and -0.82 respectively, P<0.01). Conclusions Preconditioning with desflurane, sevoflurane or isoflurane increases the preservation of ATP in anoxia-reoxygenation myocardial cells, which may be one of the mechanisms for myocardial protection.